Worksheet 62 · Skill 3

Dead reckoning

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1. At 1145 you fix your position 113°T, 1.8 nm from Gannet Rock daybeacon. You steer 158°T at 5.5 kn until 1200, then 330°T at 4.1 kn until 1210.

   Give the 1210 DR position as the true bearing FROM Kittle water tank to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Kittle water tank: ________ °T   Distance: ________ nm  

2. At 1135 you fix your position 240°T, 2.7 nm from Gannet Rock daybeacon. You steer 280°T at 6.5 kn until 1145, then 060°T at 5.4 kn until 1220.

   Give the 1220 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Tern Island tower: ________ °T   Distance: ________ nm  

3. At 1045 you fix your position 068°T, 2.2 nm from Westfield church spire. You steer 015°T at 9.8 kn until 1055, then 277°T at 4.9 kn until 1125.

   Give the 1125 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Westfield church spire: ________ °T   Distance: ________ nm  

4. At 1545 you fix your position 047°T, 3.7 nm from Westfield church spire. You steer 151°T at 7.7 kn until 1625, then 289°T at 8.0 kn until 1655.

   Give the 1655 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Westfield church spire: ________ °T   Distance: ________ nm  

5. At 0930 you fix your position 210°T, 3.1 nm from Tern Island tower. You steer 280°T at 5.9 kn until 1000, then 077°T at 7.9 kn until 1010.

   Give the 1010 DR position as the true bearing FROM Heron Point Light to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Heron Point Light: ________ °T   Distance: ________ nm  

6. At 0845 you fix your position 047°T, 2.7 nm from Tern Island tower. You steer 185°T at 9.0 kn until 0855, then 146°T at 8.8 kn until 0925.

   Give the 0925 DR position as the true bearing FROM Kittle water tank to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Kittle water tank: ________ °T   Distance: ________ nm  

7. At 1140 you fix your position 318°T, 1.7 nm from Tern Island tower. You steer 231°T at 4.1 kn until 1225, then 359°T at 6.4 kn until 1245.

   Give the 1245 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Tern Island tower: ________ °T   Distance: ________ nm  

8. At 0815 you fix your position 042°T, 3.2 nm from Heron Point Light. You steer 347°T at 9.2 kn until 0835, then 308°T at 4.3 kn until 0850.

   Give the 0850 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Westfield church spire: ________ °T   Distance: ________ nm